Teledyne 4220 Installation And Operation Manual page 180

4220 Flow Meter
Appendix D General Safety Procedures
Chemical Common
Gas
Formula Properties
Gas Chemical Common
Formula Properties
Hydro- H S Irritant and poi-
2
gen Sul- sonous volatile
fide compound. Rot-
ten egg odor in
small concentra-
tions. Exposure
for 2 to 15 min. at
0.01% impairs
sense of smell.
Odor not evident
at high concen-
trations. Color-
less. Flammable.
Methane CH Simple asphyx-
4
iant.
Colorless, odor-
less, tasteless,
flammable.
Nitrogen N Simple asphyx-
2
iant. Colorless,
tasteless.
Non-flammable.
Principal constit-
uent of air. (about
79%).
Nitrogen NO Colorless
Oxides
N O Colorless,
2
sweet odor.
NO Reddish-brown.
2
Irritating odor.
Deadly poison
Oxygen O Colorless, odor-
2
less, tasteless.
Supports com-
bustion.
Ozone O Irritant and poi-
3
sonous. Strong
electrical odor.
Strong oxidizer.
Colorless. At 1
ppm, strong sul-
fur-like odor.
D-8
Table D-1 Hazardous Gases (Continued)
Specific
Max
Gravity
Physiological Safe 60
or Vapor
Effect Min. Exposure
Density
ppm
Air =1
Specific Physiological
Gravity or Effect*
Vapor 60 Min.
Density Exposure
Air = 1
1.19 Impairs sense
of smell, rap-
idly as concen-
tration
increases.
Death in few
minutes at
0.2%. Exposure
to 0.07 to 0.1%
rapidly causes
acute poison-
ing. Paralyzes
respiratory
center.
0.55 Acts mechani- Probably no limit,
cally to deprive provided oxygen
tissues of oxy- percent-age is suf-
gen. Does not ficient for life.
support life.
0.97 Physiologically
inert.
1.04 60 to 150 ppm
cause irritation
and coughing.
1.53
Asphyxiant.
1.58
100 ppm dan-
gerous.
200 ppm fatal.
1.11 Normal air con-
tains 20.8% of
O . Man can tol-
2
erate down to
12%. Minimum
safe 8 hour
exposure, 14 to
16%. Below 10%,
dangerous to
life. Below 5 to
7% probably
fatal.
1.66 Max. naturally
occurring level
is 0.04 ppm.
0.05 ppm
causes irrita-
tion of eyes and
nose. 1 to 10
ppm causes
headache, nau-
sea; can cause
coma. Symp-
toms similar to
radiation dam-
age.
Explosive
Max. Safe
Range (% by
8 Hour
vol. in air)
Exposure
Limits
ppm
lower/upper
Max Max. Explosive Range
Safe Safe (% by vol.
8 Hour in air.)
Exposure Limits
ppm ppm lower/upper
200 20 4.3
to
300 45.0
— 5.0 15.0
— — — —
50 10 — —
— — — —
0.08 0.04 — —
Likely
Simplest and
Location Most
Cheapest
of Common
Safe Method
Highest Sources
of Testing
Concentration
Likely Most Simplest and
Location Common Cheapest
of Sources Safe Method
Highest of Testing
Concentration
Near bottom, Coal gas, 1. H
but may be petro- Ampoule.
above bottom if leum,
air is heated and sewer gas. 2. 5% by weight
highly humid. Fumes lead acetate
from blast- solution.
ing under
some con-
ditions.
Sludge gas.
At top, increas- Natural 1. Combustible
ing to certain gas, sludge gas indicator
depth. gas, manu-
factured 2. Oxygen defi-
gas, sewer ciency indica-
gas. Strata tor.
of sedi-
mentary
origin. In
swamps or
marshes.
Near top, but Sewer gas. Oxygen
may be found sludge gas. deficiency
near bottom. Also issues indicator.
from some
rock strata.
Near bottom. Industrial NO
2
wastes. tube.
Common
air pollut-
ant.
Variable at dif- Oxygen Oxygen defi-
ferent levels. depletion ciency indica-
from poor tor.
ventila-
tion and
absorp-
tion, or
chemical
consump-
tion of
oxygen.
Near bottom. Where Detectable
ozone is odor
used for at 0.015 ppm.
disinfec-
tion.
S
2
detector